John could tell that his experiment had been a great success. He threw his head back and gulped down the entire container of formula.
John shuddered as he felt a wave of pain overtake him. He watched in awe as his chicken-legs swelled to fill out his jeans, with full calves and thighs and a round, muscular bubble butt.
He saw his biceps swell larger than baseballs, staining his shirt sleeves. His pecs turned into huge melons shoving his shirt away from his new set of rock-hard 8-pack abs. His neck grew thicker in his collar.
Finally, John's clothes exploded, leaving him clothed only in a bulging pair of briefs. He admired his new body. His muscles accentuated his natural handsomeness, which had been unnoticeable before. John was very pleased with the results.